The number of times a specific event occurs compared to the total number of event is called A. frequency table
B. percentage frequency
C. Cumulative frequency
D. Relative Frequency

a is the answer correct me if im wrong

answer:

42

step-by-step explanation:

answer:

step-by-step explanation: step 1: find the number of terms

the nth term of an arithmetic sequence is given by

t

n

=

a

+

(

n

−

1

)

d

. we know

t

n

(-57), r (-5) and a (8), however we don't know n. we will therefore solve for

n

.

−

57

=

8

+

(

n

−

1

)

−

5

−

57

=

8

−

5

n

+

5

−

57

−

13

=

−

5

n

−

70

=

−

5

n

n

=

14

∴

the sequence has

14

terms.

step 2: apply the formula for sum:

when dealing with arithmetic series, we will frequently use two formulas to help us find the sum. they are:

•

s

n

=

n

2

(

2

a

+

(

n

−

1

)

d

)

•

s

n

=

n

2

(

a

+

t

n

)

since we know the first term, the last term and the number of terms, we have enough information to use the latter; this one is more efficient and easy to use than the first.

s

n

=

n

2

(

a

+

t

n

)

s

14

=

14

2

(

8

+

(

−

57

)

)

s

14

=

7

(

8

−

57

)

s

14

=

−

343

hence, the sum of this arithmetic sequence is

−

343

.

practice exercises:

determine the sum of the following sequence:

3

,

14

,

25

,

,

179

hopefully this helps, and good luck!

dikit dikit mo nalang bawal kasi naka higa eh